\newsection
\section{Systems}
\subsection{Query Optimization}
\input{parts/03_systems/00_query-optimization/00_intro.tex}
\input{parts/03_systems/00_query-optimization/01_search-space/00_basics.tex}
\input{parts/03_systems/00_query-optimization/01_search-space/01_rewriting-rules.tex}
% \input{parts/03_systems/00_query-optimization/01_search-space/}
% \input{parts/03_systems/00_query-optimization/}